A sermon preached at St. Peter's Church, Charleston, by the Rev William O. Prentiss, on Wednesday, November 21, 1860 : being a day of public fasting, humiliation, and prayer, appointed to be observed by the legislature of the state of South Carolina, on contemplation of the secession of the state from the union, and repeated at St. Peter's church, at the request of the congregation, on the evening of Sunday, November 25, 1860, and again in the legislative hall at Columbia, during the session of the legislature.